Process of obtaining and separating oxygen and nitrogen from the atmosphere.



men A STATES PATE; FFICE,

GEORG KAsz NER, or MtTNsTnR, GERMANY, ssreivon TORHEINISCHE.DAMPFKESSEL UND MASGHINEN-FABRIK BT'TTTNER G. M. B. 11., or UERDINGEN-QN-THE-RHINE,

PROCESS-OF OBTAINING AND SEPARATING- OXYGEN AND NITROGEN FROM THE GERMANY.

ATMOSPHERE.

1,015,566. Specification of Letters Patent.

No Drawing.

To all-whom it may concern:

Be it known that I, Gnono KAszNEn, a subject of-the King-of Prussia, and resident ofMiinster, in the Province of Westphalia, German Empire, have invented a new and useful Process for Obtaining and Separating Oxygen and Nitrogen from the Atmos-' alkaline hydrate and a manganese oxid to the action of steam and air. The eflicient carrying out of, the process is however prevented owing to the physical action of the alkali which is freed during the action of the steam upon the reacting mixture, inasmuch as the alkali causes the reacting mixture to become soft or plastic and fills up the pores of the same. Furthermore under the in: fluence of the steam the alkali separates Under both conditions the alkaline particles as separated from the particles of the manganese oxid (MnO and the like) necessary for the reformation of the manganate and thus an efiicient reformation does not take place on the admission of the air current. 7

According to the present invention these deficiencies areobviated by the addition to i the reacting mixture or manganate of a sub-,

stance which is capable of uniting with the alkali freed during the action of the steam, the alkaline compound thus formed being decomposed on the reformation of the manga nate by the admission of air, the alkali being freed by the decomposition so as to be capable of reaction with the manganese oxids. For this purpose it is preferable to employ the 'meta-plumhates of the alkalies, which combine'with the excess of alkaline hydrate at a temperature of between 300 600 C,to form ortho-plumbate (for example compound easily capable of decomposi-' tion. When the ortho-plumbates are the manganese oxids, the latter enable the alkali to be reformedfrom the orthoplumbate by transforming the latter into meta-plumbate, whereupon thealkali enters into reaction with the reformation of the manganate. By the admission of steam the process of formation of ortha-plumbate takes place again with the generation of oxygen and the combination of the alkali with the metaplumbate. In this manner any disadvantageous or excessive separation of the alkali from the manganese oxids does not take place. Moreover the reacting mass does not sinter, provided that the temperature does not rise above the necessary degree and the process may be carried out for a much longer period and more often repeated while obtaining greater efliciency'than was heretofore possible.-

The efiect of the alkaline plumbate added to the reacting mixture increases according to. the temperature employed. A -small addition of the plumbate is sufficient (with about a temperature of for example 350? C.) in order to maintain the reaction, but with higher temperatures an increased quantity of plumbate must be used, until the proportion in the mass is ultimately 1 atom of manganese to 1 atom of lead.

The reaction is given in the following equations (a.) Generation of oxygen on the admis- I Na PbO +MnO +I I O+O (b.) Reformation of manganate on the admission of air:

. Patented Jan. 23, 1912.

Application filed May 20, 1911. Serial No. 628,493.

' It will of course be readily understood if that the alkaline plumbate may be added to acting mixture by the addition ofits components lea-d monoxid, oxygen or air, and

alkaline hydrate, ci ia or superoxid. In-

stead of lead monoiiid the metal or any other compound of lead may be employed which is capable of yieldinglead monoxid on heating or on exposuret'o air, as for example red lead, lead suboxid, lead peroxid, lead nitrate or the like. The manganate or permanganate can also of course be produced in the reacting mixture by its oomponent parts, It will also be understood that only oxygen is taken from the air-current which is used to regenerate the mass and that the remainder of the air consists of pure or nearly pure nitrogen which in the same Way as the oxygen may be collected in any desired manner.

I claim 1. In a process for separating and obtaining oxygen and nitrogen from the atmosphere by means of the alternate formation, under the action of air, and decomposition, under the action of steam, of alkaline man- I ganates or permanganates; the addition of a substance capable of combining with the alkaline hydrate freed during the action of the steam, the compound thus formed readily decomposing and yielding the alkaline hydrate on the action of air.

2. In a process for separating and obtaining oxygen and nitrogen from the atmosphere by means of the alternate formation, I under the action of air, and decomposition, under the action of steam, of alkaline manganates or permanganates; the addition of substances capable of uniting in the react-ion mixture to form a compound capable of combining with the alkaline hydrate freed during the action of the steam, the compound thus formed readily decomposing and under the action of air,

yielding the alkaline hydrate on the action of air.

3. t In a process for separating and obtaining oxygen and nitrogen from the atmosphere by means of the alternate formation, under the action of air, and decomposition under the action of steam, of alkaline manganates or permanganata; the addition of an alkaline meta-plumbate which is capable of combining with the alkaline hydrate freed during the action of the steam to form alkaline orthocomposes and yields the action of air.

4. In a process for separating and obtaining oxygena-nd nitrogen from the atmosphere by means of the alternate formation, and decomposition, under the action of steam, of alkaline manganates or permanganates; the addition of substances capable of uniting in the reacting mixture to form an alkaline meta-plumbate which is capable of combining with the alkaline hydrate, freed during the action 'of the steam, to form alkaline ortho-plumbate, Which readily decomposes and yields the alkaline hydrate on the action of air.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

GEORG KASZNER. [L. s.] Witnesses I ALBERT F. N UFER, ALFRED HENKEL.

plumbate which readily de- 1 the alkaline hydrate on 

